Computing attachment for type-writers.



a. M .IDES IARDINS. COMPUTING ATTACHMENT FOR TYPEWRITERS.

APPLICATION FILED JAN. 14. I599. RENEWED SEPT. 26, l9l2. 1,163,616;

Patented Dec. 7, 1915.

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B. M. DES JARDINS.

COMPUTING ATTACHMENT FOR TYPEWRITERS. APPLICATION FILED mm. 14. I899- RENEWED SEPT. 26. 1912.

1,163,616. Patented Dec. 7, 1915.

8 SHEETS-SHEET 2.

B. M. DES JARDINS.

COMPUTING ATTACHMENT FOR TYPEWRTTERS.

APPLICATION FILED IAN. 14. I899. RENEWED SEPT. 26. m2.

Patented Dec. 7, 1915.

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COMPUTING ATTACHMENT FOR TYPEWRITERS.

APPLICATION FILED JAN. 14. 18991 RENEWED SEPT. 26. 1912.

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COMPUTING ATTACHMENT FOR TYPEWRITERS. APPLICATION FITLED IAN. 14, I899. RENEWED-815F126, 1912.

1,163,616. Patented Dec. 7. 1915'.

8 SHEETS-SHEET 5.

B. M. DES JARDINS.

COMPUTING ATTACHMENT FOR TYPEWRITERS.

APPLICATION FILED JAN.14. I899. RENEWED SEPT. 26. I912.

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COMPUTTNG ATTACHMENT FOR TYPEWRITERS.

APPLICATION FILED 1AN.I4. I399. RENEWED SEPT. 26. 1912. 1,163 616, Patented Dec. 7, 1915;

8 SHEETS-SHEET 7.

B. M. DES JARDINS.

COMPUTING ATTACHMENT FOR TYPEWRITERS.

APPLICATION FILED JAN. 14. I899. RENEWEDSEPT. 26. 1912.

1,163,616. T Patented Dec.7, 1915.

8 SHEETS-SHE T 81 j'- 4 ,1, F|G.29. 35 1 J J 4 /-l FIT-P193014? WITN ESSES= I INVENTO R'- BY AWEY.

UNITED STA PTENT @FFEGE.

BENJAMIN M. DES JAIRDINS, OF WEST HARTFDBD, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO JOHN T. UNDER'WOOD, 0F BROOKLYN, NEW YORK.

COMPUTING ATTACHMENT FOB TYPE-WRITERS.

Application filed January 14, 1899, Serial. No. 702,163. Renewed September 26, 1912. Serial No. 722,528

T 0 all whom it may concern:

Be it known that I, BENJAMIN M. Dns Janonvs, a citizen of the United States, residing at West Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improve ments in Computing Attachments for Type- Writers, of which the following is a specification.

My invention relates to improvements in computing registers specifically applicable to type-writers, and broadly considered consists of means by which the figures printed 'or written by said type-writer are automatically computed as fast as they are Written.

The present embodiment of my invention may be said to consist, essentially, of a series of coaxial revoluble indicator-rings or bands having figures delineated thereon, with automatic, mechanical means for turning one or more of said rings simultaneously with the manipulation of any one of the figure-keys of the writing machine.

The objects of my improvement are, first, to produce an automatic computing device that can be attached to, and operated by, type-writers; second, to provide such a device capable of computing figures, as rapidly as they can be written by the operator, with absolute accuracy and without retarding the speed, impeding, or interfering in any way with the usual or ordinary manner of manipulating the writing machine; third, by incorporating this device with a'type-writer of any of the standard grades, to convert the same into a computing as well as a writing machine; fourth, to furnish a comparatively simple and inexpensive mechanical means for calculating figures as they are written, whereby the same is brought within reach of the average man or woman who possesses a type-writer; and fifth, to provide a device which insures the proper results whether operated by an expert or a nonexpert, the only requirement being the figures shall be indicated by striking the particular type-writer keys-that represent said figures and cause them to be printed, the carriage of the writing machine being suitably located at the beginning of each number. as must-be done in any event, in order to assemblelhe different numbers into column formation.

Different arrangements of the parts from those herein shown and described, for pro- Specification of Letters Patent.

ducing the desired results, may be employed, together with mechanical equivalents of some or all of said parts, but I have utilized the present combinations for the production of a serviceable and practical register, with the intention of claiming broadly the application of a calculator to a type-writer.

"vvith the present invention I am able to obtain results from any writing machine to which my device can be attached, heretofore unattainable, thereby greatly enhancing the value and practicability of the machine as a. labor-saving and time-economizing factor in the various uses to which it is applied.

It will be understood that this computing register can be attached to an old machine, as well as to a new one, with comparatively little trouble, and, when in place upon any machine, does not interfere with 4 ning of their travel; Fig. 8, a longitudinal,

vertical section through the indicator-rings in said case; Fig. i, a transverse, vertical section through the case and contents, in the direction of the indicator arrows 4, Figs. 3 and 6; Fig. 5, a similar section to the latter, in the direction of the arrows 5, Figs. 3 and '7 Fig. 6, a longitudinal, vertical section in the direction of the arrow 6, Fig. 4, showing the reciprocating members in the case at the end of their travel, with the blade and pinions depressed; Fig. 7, a similar section to the latter, in the direction of the arrow 7, Fig. 5, showing said members occupying an intermediate position, with said blade and pinions elevated; Fig. 8, a side view of the locking-blade; Figs. 9, 10 and 11, end and bottom views of said blade, in the directions of the arrows 9, 10, and 11, respectively, Fig. 8; Fig. 12, a longitudinal, vertical section through the pinion-block, in the direction of the arrow 12, Fig. 13; Fig. 13, a top View of said block as indicated by the arrow 13, Fig. 12; Fig. 14, a right side view of anected therewith being in dotted lines to permit the parts behind the same to be seen; Fig. 15, a horizontal section through said last mentioned case, in the direction of the arrow 15, Fig. 14, looking down onto said escapement mechanism; Fig. 16, a side view of the connection between the carriage and the driver-actuating arm,in the direction of the arrows 16, Figs. 1 and 17; Fig. 17, a front View of said connection, as indicated by the arrows 17 Figs. 1 and 16; Fig, 18, a side view of a figure key showing the connection between the same and one of the stop-finger rock-shafts, in the direction of the arrow 18, Fig. 19; Fig. 19, a rear view of said figure-key connection, as indicated by the arrow 19, Fig. 18; Fig. 20, a front view of the cut-out device. Fig. 21 is a plan view, on an enlarged scale, of a part of the typewriter, showing the carriage and escapement devices, a portion of the platen being removed to show a letter and figure type; Figs. 22 and 23 are detail views of the means for controlling the operation of the devicesfor transmitting movement from the typewriter carriage to the sliding member of the computing mechanism; Fig. 21 is a detail view of the connection between the rock shaft controlling the movement of the locking devices of the computing mechanism and a bar actuated by the figure keys of the typewriter. Fig. 25 is a plan view of the connections between the typewriter carriage and the computing device at the moment when the master wheel is engaged with the units or lowest computing wheel. Many parts in this figure are broken away, so as to show the connections more particularly between the typewriter universal bar and the computing mechanism. Fig. 26 is a front view of the lug which carries the master wheel along with the typewriter carriage at the moment of being disconnected therefrom. Figs. 27 to 35 inclusive, are side views of the numeral keys of the typewriter and the connections from them to the variable escapement mechanism; the views being taken at the bottom of a key depression. Fig. 36 is a side view similar to Fig. 1-1, but showing a key depressed and with more parts broken away to show more the connectlons between the keys and the computing mechanism.

Figs. 1, 16 to 20 inclusive, are about halfsize; Figs. 14 and 15 are approximately full size, and the other views are on an enlarged scale.

Similar letters and figures refer to similar parts throughout theseveral views.

The computing register may, for purposes of illustration and description, be said to be divided into two divisions, as follows: first,

the register proper which performs the actual work of calculation and displays the result to the eye of the operator at every stage of the process; and, second, the intermediate, operating mechanism which is interposed between the parts of the typewriter whose movements are controlled by actuating the keys thereof and the parts of the register, whereby the latter is made to produce results in exact accordance with, and consequent upon the action of the former. The several members of the typewriter shown and described in connection with my invention, are designated by letters, while numerals are employed to indicate the various parts of the register and intermediate mechanism, and in connection with the direction indicating arrows.

As hereinbefore stated my computing register is so constructed that it can be applied to any standard typewriter. Therefore in the accompanying drawings I have merely illustrated, more or less conventionally, the general construction of one style of typewriter in common use, in which the platen is moved step by step as the desired keys are successively operated.

The register proper is inclosed in the cylindrical case 1 which is securely fastened to the right-hand upright of the type-writer frame A (Fig. 1), by means of the bracket 2. The case 1 is suspended by it's bracket between the rear keys of the type-writer, andthe vertical front of the frame thereof, at the right of the center of the machine, and' entirely remote from the movable parts of the same. Centrally located within the case 1 (Figs. 2 to 7) are the six indicatorbands or rings 3, 3 3, 3, 3 and 3 representing, respectively, units tens, hundreds, thousands, tens of thousan s,and hundreds of thousands. Each of the rings 3, 3, etc., is provided on its periphery with the units from 1 to 9 inclusive, and the 0, in large characters foraddition and in small characters for subtraction, and said computing wheels or rings are retained against lateral movement by the internal annular flanges 8 8 at each side of the series or rings, but the latter are permitted to revolve within the chamber thus provided for their reception. The sight-slot or opening 14 is cut in the top of the case 1, above the series of rings 3, 3, etc., of suiiicientsize to permit one large and one small figure on each of said rings to be seen, when they are at rest; the construction being such that the uppermost figures thereon always line up beneath said opening except during the time of revolution of the revoluble members. The rings 3 to 3 inclusive, are provided with inwardlyprojecting teeth 20 which form internal gears adapted to mesh with tens-carrying or carry-over pinions 21 on the shaft 22, when required to do so. Each of the rings 3 to 3 accommodation of said blade.

inclusive, is provided with the left-hand, annular flange 23 which fits into the contiguous ring, the flange on the ring 3 being received by the ring 3 that of the ring 3 being received by the ring 3 etc.; each flange having a two-toothed starting segment 23f extending from the left side face thereof (Fig. 4). The space between the two teeth that make up each of the segments 23, is continued into the integral flange 23, and said segment is'also adapted to mesh with or engage one of the pinions 21 once in every revolution of the ring which it is on. The segment 23 on each of the rings speciiied,like the flange 23, fits into the contiguous ring and turns therein, at the right of the teeth contained in said contiguous ring. The pitch of the segment teeth and of the teeth 20 is the same. Every other tooth on each pinion 21 is wider than the following or preceding one, and the adjacent flange 23 rides on two of the wide teeth when said pinion is elevated, forming a lock to prevent the same from turning except when the narrow tooth between two previously mentioned, is engaged by the outwardly projecting segment 23 at which time the pinion makes a partial revolution the dip in the locking flange 23 forming a continuation of the space between the two teeth of segment 23, permitting this movement by accommodating the adjacent long tooth. These pinions and the serrated rings constitute a Geneva-stop movement which is so well understood as to require no further specific description here. This mechanism effects a carry-over or tens-carrying operation to.

transfer each complete revolution from each ring of lower denomination to the ring of next higher denomination. All of the rings 3, 3, etc., are provided With the internal driving-teeth 24 located at the left of the teeth 20 in the various rings, except the ring 3 which does not require the latter teeth, but has the former. The teeth 24 number ten in each of said rings, and extend inward considerably nearer the center than do the teeth 20.

The flanges 8 8 practically divide the case 1 into three compartments or sections, the middle one being constantly occupied bythe rings 3, 3, etc., while the pinion-block 25 and the locking-plug 26 are reciprocated in the leftand right-hand sections respectively. The block 25 and the plug 26 are prevented'from turning in the case 1, by means of the splines 27 and 28 which respectively engage suitable grooves in the opposite, enlarged ends of said block and plug. The block 25 is chambered at 29 to receive the five pinions 21 and the operating mechanism for the rising and falling, pinioncarrying blade 30, and has the slot 31 extending through the bottom thereof for the The blade has the vertical arms 32 which carry the shaft 22 for the pmions 21, and the forwardly-extending lugs 33 slotted to receive ears 3? directly beneath the pinions 21 for the purpose of alining the teeth of said pin- 1011s when the latter are lowered. The shaft '38 passes through suitable openings in the left-hand end of the case 1 and the head of the block 25, and is rigidly connected with the pin 34 by the rocker-arm 39. Outside of the case 1, the shaft 38, telescopes into the rock-shaft 40, and has the pin 41 operating through the slots 42 in said rockshaft, whereby a rocking motion is imparted from the latter to said first mentioned shaft which nevertheless has an independent, longitudinal movement. The rock-shaft isroperat'ed by means described under the head of intermediate mechanism.

The locking-plug 26 has the external rib 43 adapted toengage the teeth 24 of such of the rings 3, 3*, etc, as are contiguous there to, and lock said rings in place. The shaft 44 enters the right-hand side of the case 1, passes through the head of the plug 26 and has its internal bearing in the right end 45 of the block 25, being secured in place by the disk 46. The annular driver or master wheel 47 is rigidly attached to the shaft 44 between the end 45 and the plug 26, and is provided with the tooth 48 adapted to engage any of the teeth 24. The collar 49 is fast to the shaft 44 at the right of, but

contiguous with, the plug 26 and serves with the disk 46, to connect the several, laterallymovable members together, so that they always maintain the same relative position to each other regardless of their changing positions in the case- 1. The rod 50 extends to the left from the head of the block 25, through an opening in the adjacent end of the case 1, and the'spring 51 is'interposed between the end of said case and the pin in the outer end of said rod. The spring 51 has a tendency to force the rod 50 to the left and thereby normally retains the block 25 and connected parts at the extreme lefthand end of their travel, with the tooth 48 of the driver or master wheel 47, engaging the teeth 24-in the ring 3 and the rib 43 of the plug 26, engaging the teeth 24 in the other rings. The shaft 44 telescopes into the left terminal of the shaft 53, outside of the case 1, by which the driver 47 is rotated, the pin 54 and slots 55 serving the same purpose in connection with said shafts, that a similar pin and slots do for the block shaft and its rock-shaft previously described. Motion is imparted to the shaft 53 from some suitable source of power, as the clockmovement which will be described in connection with the other intermediate mechanism, as well as the device which compels the block 25 and connected members to follow inversely the movement of the typewriter carriage.

I will now proceed to describe the intermediate, operating mechanism, and in connection therewith, refer briefly to such well-known parts of the type-writer as enter intimately into the construction and operation of my invention.

The rocker-arm 56 projects to the rear from the rock-shaft 40, and is connected by the rod 57 with the regulation universal or carriage. shift bar B which is always depressed by the ordinary keyand space-levers. The shaft 40 has its bearings'in the case 1 and a projection from the frame A. It will now be seen that, every time the bar B is depressed, the shaft 40 is rocked and elevates the pinions 21 until their teeth mesh withthe teeth 20 in as many of the rings 3 to 3, inclusive, as said pinions are capable of engaging at the time the depression takes place, and said pinion teeth are also brought into the paths of the adjacent segments 23*, through the medium of the blade 30 and intervening parts. When the bar B returns to its normal position, upon the release of the pressure thereon, the blade 30 is lowered and withdraws the pinions 21 from the paths of the teeth 20 and the segments 23*. forcing the lowest teeth of said pinions into contact with the ears 37 for the purpose of perfectly alining and locking said last men-- tioned teeth to insure accurate engagement the next time the pinions are raised, the friction between the parts being sufficient to retain them in the position fixed by said ears until again. rotated by the rings 3, etc'.

The horizontal rod 58 is securely fastened to the carriage C and extends to the right therefrom, over the top of the machine. The notches 58 are cut into the back side of the rod 58 at intervals corresponding with the graduations on the type-writer scale D or in other words at letter-space intervals. The angular arm 59 is pivoted at 60 to the top of the frame A and its downwardly extending. front end is arranged to bear against the head of the block rod 50. The sleeve 61 is adjustably mounted on the rod 58 and has the set-screw 62 adapted to register with any one of the notches 58 and secure said sleeve to said rod. The rear end of the arm 59 lies in the path of the-tripping-lug 63 which is pivoted at 64 (Fig. 22) to the/sleeve 6land has the steps or shoulders'63 63 and 63. The weight of the front, major portion of the lug 63 causes it to drop down with its lowest step 63 resting on the top of the frame A, except when the cam-plate 65 is encountered when said lug swings upward on its pivotal connection with the sleeve 61. The cam-plate 65 is attached to the top of the frame A, in front of the rod 58 and in the path of the tripping-lug shoulder 63 by screws or any other means which render the same adjustable relative to the adjustment of the sleeve 61 and in accordance with the results desired to be obtained. The supplemental cam-plate 66 is adjustably connected to the plate 65 by the screw 67 (Fig. 23), a slot being provided in said plate 66 for the accommodation of said screw the front end of which is threaded into said plate 65. The rear end of the arm 59 is turned upward to engage the highest step on the lug 63 when the latter is in its normal position. The set-screw 62 in the sleeve 61, and the notches 58 in the rod 58, enable said rod and the carriage C to be adjusted with reference to the arm 59 for the purpose of permitting the former to be returned to or started from any predetermined position, or to engage the register at any required point along the scale D, with said arm engaging the rod 50 while'the latter is tensioned to the left end of its stroke. As an illustration of the idea sought to be conveyed .in the last sentence, suppose a column of figures is to be written one or more numbers in which are in the hundreds of-th0usands, and it is desired to place said column on the paper so that the figures representing hunderds of thousands will occupy a position corresponding to the index-mark 50 on the type-writer scale D, it is only necessary to loosen the set-screw 62, move the sleeve 61 on the rod 58 until said set-screw registers with the notch 58 that corresponds with said index-mark, and tighten said screw. The particular. notch 58 may be determined by placing suitable indications on the bar 58 adjacent said notches, or by moving the typewriter carriage until the pointer thereof is opposite the desired graduation on the typewriter scale and then adjusting the lever 59 and stop 63 in the manner heretofore described. Now, when the carriage C is actuated so that its attached pointer E registers with the mark 50, the shoulder 63 bears against the rear end of the arm 59 and the front end of said arm rests against the head of the rod 50 which is thrust out to its full extent by the spring 51. Every time the carriage G is actuatedtothe left one number or notch,

froln this location, the driver or master wheel 47 is moved to the right from one of the said indicator-rings to the next, through the medium of the arm 59 and connecting parts, and when said carriage is returned to its starting point, said driver goes back to its initial position. within the ring 3, the lug 63 drawing away from said arm as soon as the said marl; has been passed by the car riage pointer E Thus is a simple means provided for operating the driver 17 from the carriage C, when it is desired to use the register so that the denominations of the numbers as computed will accord with the denominations as typewritten, and for disconnecting said driver from the said carriage after said register has performed its work; this last result being obtained by moving the sleeve 61 along the rod 58 to the right and taking the lug 68 out of the way of the arm 59.

The operation described in the last part of the previous paragraph, provides for numbers that have no decimal or other division marks between the figures'composing the same, hence the cam-plates 65 and 66 are not required or employed, but are either detached from the machine altogether or moved to one side away from the lug 68. In order to be able to point oif certain figures the cam-plates before mentioned are made use of in the following manner :-If the numbers to be written and computed comprise dollars and cents, $1721.12 for example, the sleeve 61 is first properly adjusted, then the cam-plate 65 is so disposed on the frame A relative to the lug 63, that the latter travels four points or places with the shoulder 63 in contact with the arm 59, before arriving at the first or lower elevation on said plate; consequently moving the driver 17 from the ring 3 to 3. The period for the decimal point is next struclr and the carriage C actuated one place, but the gear 68 is locked at this time by the cut-out mechanism hereinafter described, so that the driver 47 remains immovablyi in engagement with the ring 3 because the plate has caused the lug63 to swing upward s'ufiiciently for the shoulder 63 to clear the arm 59 leaving it stationary while said lug travels from said shoulder to the shoulder 63*, the latter now being in readiness to engage said arm and move said driver into contact with the remaining ring 3. If necessary to write other matter after each number, the cam-plate 66 is so adjusted as to cause the lug 63 to ride onto the same after the last figure ,in said number has been written, and

raise itself clear of the arm 59. Suppose that two divisions in a number are required, such as 1,721.12, the cam-plate 65 is so adjusted as to receive-the lug 63 upon its lower elevation after the 1 has been written, and upon its higher elevation after the next three figures have been written, said lower elevation being of the right length to permit this Thus the arm 59 is actuated by the shoulders 63*, 63 and 63 in succession. A similar ad justment is possible for a point after the first three figures, thus 172,112. In the last two instances as well as in the first, the camplate 66 is employed and suitably adjusted when the nature of the work requires the carriage C to proceed after the number has been written, before being returned for a new line or number. I

The case 69 is attached to the right side of the frame A. and the right terminal of the driver shaft 53 has its bearings therein.

The actuating and stop mechanism for the driver 17, forming a part of the intermediate mechanism, is contained in the case 69 and will next be described. The shaft 53 is driven by a simple clock-movement consisting of thegear 70 on the stud 71, and the intermeshing pinion 72 tight on said shaft, said gear being run by the spiral-spring 7 3, subject to a certain, peculiarly constructed cscapement operated by any one of the figure-key levers F to F inclusive, and the carriage shift-bar B, The stud 71 is journaled in the diaphragm it at 7 and-the right side of the case 69, projecting beyond the latter to receive a key for winding the spring 73, the clock-movement being provided with the spring actuated pawl 7 5 and the ratchet 7 6 at the left of the gear 70, to enable the same to be wound up. The driver or escapernent gear 68 is fast on the shaft 53 and has 10 teeth on each side of its rim or flange, The sleeve 77 is splined on the shaft 53 at the right of the gear 68, so as to rotate I with said shaft while having a longitudinal movement thereon. The driver-stop disk 78 isloosely mounted on the sleeve 77 and is provided with the following projections: The gear-engaging pin 7 9 from its left face, the stop-pin 80 from its right-face, the stop 81 from its periphery, the stop 81 from the 7 left side of said periphery, and the stop 81 from the right side of said periphery. Assuming that the periphery of the disk 78 is divided into ten equal parts which correspond to the number of teeth on each side of the gear 68, as shown in Fig. 14, (no such delineations being required in practice, however), the stop 81 is located at 0, the stop 81 at 6, and the stop 81 at 3, for reasons presently to be given. The shifter 82 which is of a bell-crank lever form, is pivoted at 83 to the lugs 83 extending from the left side of the case 69, and has its lower terminal attached to the shift-bar B. The upper end of the shifter 82 is bifurcated and the rear bifurcation or arm 82 extends around the gear 68 and normally engages one of the lefthand teeth thereon, while the front arm 82 enters the groove 7 7 a in the sleeve 77. It will now be seen that, every time the bar B is depressed, the shifter arms 82 and 82 swing to the left, the first of said arms releasing the gear 68 and the second one actuating the sleeve 77 and the disk 78 until the pin 79 engages the teeth on the right-hand side of said gear. If the gear 68 is free to revolve'at this time, the clock-spring 73 immediately causes it to do so, and the disk 78 is carried around superior to said spring.

Since the driver or master wheel 47 is rigid with the same shaft as the gear 68, it

follows that said driver will turn as far as said gear; for instance, if the disk 78 is checked after the gear has moved the distance of two teeth, the driver moves alike distance and turns its engaging indicatorring or computing wheel the distance of two of its teeth 24. These movements are quite rapid and take place upon the depression of the bar B, as stated, and when said bar returns to its normal position, the shifter 82 causes the disk 78 and the gear 68 to be disconnected and the arm 82 reengages said gear, thereby locking the same against the action of the clock-'movement. The rear end of the extension 85 from the front side of the case 69, lies in the path of the stoppin 80 and the spring 86 having one end fastened to said extension and the other to the disk 78, serves to retain the latter in its normal position with said pin bearing against the extension and the stop 81 adjacent to the stop-finger 0 lVhen engaged and operated by the gear 68, the disk 7 8 is actuated against the resiliency of the spring 86 which is weaker than the clock-spring 73, but the instant these two members are dis engaged said spring 86 returns said disk to its normal position. I

The ten rock shafts 1 2, etc., to O, inclusive, have their hearings in opposite sides of the frame A and in the case 69, three of said shafts being below the horizontal plane of the other seven for the purpose of economizing space, and all are below the action of said key-and space-levers. The rock shafts 1, etc., may have their bearings in the case 69 and a plate fastened to the oposite side of the frame A, thus extending Beneath instead of through said frame, if desired, an arrangement that might facilitate placing my invention on an old machine. Each of the rock-shafts 1, 2, etc., is provided with a rearwardly extending rocker-arm 87, on its right-hand end, and with a forwardly extending rocker-arm 88, intermediate of its ends. Each of -the rocker-arms 88 is pivotally connected with its proper figure-key lever' F F etc., by means of a link mechanism consisting of the strap 89 around said lever, the cylinder 90 pivoted at the base to the rocker-arm, and the plunger 91 pivoted at the top to said strap, with its lower terminal extending into said cylinder. This link mechanism pro vides for a variation in the upward stroke of the key-levers, but insures a positive and substantially even movement of the rockshafts 1, etc., when said levers are depressed, the plungers 91 always arriving at the bottom of the openings in the cylinders 90' in time to impart said movement upon the down stroke of the levers. Each rockshaft 1 etc., is provided at its left end with the spiral-spring 190 for returning said shaft to its normal position, after being actuated by its respective figure-key lever F etc. The spring 100 is wound around its rock-shaft, with one end fastened thereto and the other to the frame A. lVhen one of the shafts 1 etc., is returned by its spring 100, the bottom of the opening in the attached cylinder 90 may or may not come in contact with the base of the plunger 91 that operates therein; this depending upon the position of the coacting figure-key lever, as before intimated, but said plunger is always in connection with said cylinder, either actively or inactively. The levers F to F", inclusive, respectively terminate in front in the upwardly-turned keys 7 to f inclusive, and, when one of these keys is depressed, it will be readily seen from the foregoing that the rocker-arm 87 on the corresponding rock-shaft 1, etc., is elevated.

9 0 are pivoted at their bases to the rear ends of the arms 87 on the shafts 1, 2, etc., respectively.- The upper ends of the fingers 1 2 etc. extend into suitable openings in the diaphragm 7a through which they operate, and, when normally disposed, said ends clear the arc of travel of the stops 81, 81 and 81".

The diaphragm '71 extends across the case 69, from front to back, beneath the disk 78. Said stop-fingers are so arranged as to group their upper ends in triplets side by side, with the exception of the finger 3 which stands alone; the first or front group comprising the fingers 2 6 and 9* the second or middle group comprising the fingers 1 5 and S and the third or rear group, the

finger 0 4 and 7 the fingers 2 1 and 0 being placed behind the finger 3 in the order named; the fingers 6 5 and l being next in line from front to back; and, lastly, the fingers 9 8 and 7 WVhen the disk 78 is in its normal position, the upper ends of the said stop-fingers are arranged around the lower portion of the periphery of said disk, as follows :the end of the finger 3 adjacent to the division 3, Fig. 14, the ends of the front group adjacent to the division 2, those of the middle group adjacent to th division 1, and those of the rear group ad'- jacent to the division 0. Thus three-tenths of the periphery of the disk 78 are always over the said stop-fingers and, by this compact and convenient arrangementof said fingers, I am able to check said disk and with it the gear 68, at a point representing or corresponding with any tooth on said gear, by throwing up the requisite finger into the path of its engaging stop. To illustrate the operation of the said stop-fingers,

meaeie key was depressed, by the bar. B and the shifter 82. The dish 78 new turns five points in the direction of the arrow 84 in Fig. 14, or the distance of five teeth on the gear 68, when the stop 81 encounters the finger 5 and checks the revolution of the parts. When the pressure on the figure-key f is removed, the bar E and the lever F return to their former positions, thereby rocking the shifter 82 to the right and allowing the finger 5 to be withdrawn through the medium of the associated spring 100. This movement of the shifter 82 relocks the gear 68 and moves the disk 78 to the right, the spring 86 returning said disk to its starting oint. lVhen the he 0 on the Writin P 1: machine is struck, the finger O at once errcounters the right-hand stop 81 and prevents the disk 78 and gear 68 from turning. Examples in addition-and subtraction as performed by the register, Wlll be introduced in this specification at the proper place, for

the purpose of amplifying the description of the operation of the several parts, indi-- vidually and collectively, but more especially the latter. 7

An eleventh rock-shaft 92 is journaled either in the frame A or so as to pass underneath the same, and projects at both ends beyond said frame, the right-hand terminal of said shaft being in the case 69. The left.

and rig-ht ends of the shaft 92 are respectively provided with the rocker-arms 93 and 94 extending forward therefrom. The cut-out finger 95 is pivoted at its lower end v to the rocker-arm 94, passes through the guide 96 extending from the left side of the case 6 and normally engages the left-hand teeth on the gear (38 for the purpose of looking the same against the action of the clockmovement. The finger 95 is elevated into engagement with the gear 68 by means of the spiral spring 97 which is attached to the shaft 92 and the frame A in. the same way that the springs 100 are connected with their rock-shafts and said frame. The, front end of the arm 93 supports the cut-out key 98 by which the finger 95 is withdrawn from contact with the gear 68. The screw 99 is inserted in the frame A, with its rounded head projecting slightly into the lower end of the path of the arm 93. The use and operation of the cut-out device just described, is set forth below. \Vhile the finger 95 locks the gear 08, the rotation of the driver 47 is prevented and the type-writer can be employed for ordinary purposes, provided the carriage connection is disconnected as previously explained. But, when it is required to introduce numbers for computation into the matter being written, or, to state it more correctly, introduce words before or after said numbers, or both, it is necessary to depress the key 98 sufficiently to release the gear 68 from the finger 95, before proceeding to write the figures comprised in each of said numbers, The key 98, at such a time, is depressed by the thumb or a finger of the left hand, until the arm 93 strikes the screw 99 and, after the last figure of each number has been written, the key having been held down meanwhile, pressure is released, thus"permitting the spring 97 to rock the shaft 92 and reloek the gear 98. When it is desired to write the numbers without any accompanying words, however, the key 98 may be depressed with sufficient force to frictionally engage the arm 93 with the screw 99, which holds the parts against the resiliency of thespring 97. This gives the operator the use of both hands with which to manipulate the figure-keys. At the completion of the computation, the arm 93 is raised clear of the screw 99 and the spring 97 again causes the finger 95 to be thrust into the gear 68. It will be understood, of course, that the spring 97 and the screw 99 instead of being attached directly to the frame A, may be fastened to a plate which is in turn secured to said frame. This construction is preferable when the rock-shaft 92 is journaled beneath the frame A, as in the case of an old machine.

Before proceeding with a description of the general operation of the computing register, I wish to call attention to the fact that more or less than six indicator-rings may be employed with their coacting mechanism changed accordingly, without in any sense violating the spirit of my invention. Furthermore I wish to state that my register can be used for subtraction as well as for addition to adapt the mechanism for subtraction I provide a second series of figures 4 .posed of figures that are considerably smaller than the others, and each figure in said second series consists of a digit which, if subtracted from nine, will leave the neighboring large figure in the first series. The. complete arrangement of the two series of ring figures is as follows :-The small 9 alternates with'the large 0; the small 8,

with the large 1; small 7, with large 2; G with 3; 5, with 4;4, with 5; 3, with 6; 2, with 7; 1, with 8; and 0, with 9. The presence and arrangement of the figures on the indicator-rings noted above, serve as a sub stitute for mechanism that would otherwise. be required to reverse certain of the move ments of the register in order to utilize the same for the process of subtraction, and said figures therefore constitute a valuable factor in my improvement.

The following concrete example illustrating theprocess of adding and subtracting is submitted to insure a better'and clearer understanding of the general operation of the register. X. bought twobills of goods from Y., the first amounting to $7,97 5.00, and the second, to-$ l78.50, upon which he has paid the I following amounts-$6,751.25, $79.00, and $629.75. It is now desired to find the total amount of the billsv and the balance due. A statement embodying the above, appears below, and it will be noticed from the appended explanation thereof that the different items to be subtracted do not require to be added separately, the two processes being automatically performed at the same time and together.

In writing and computing the above, the operator first sets the sleeve 61 so as to permit the paper in the carriage C to receive the .first 7 far enough away from its right-hand edge, for the other figures in the number to be written thereafter. The cam-plate 65 is next adjusted for the decimal point. The

carriage C is now actuated to the right as far as necessary for commencing the first line, and the two words contained therein are written; after which the dollar sign is printed in the proper place, the key 98 is depressed to unlock the gear 68 leaving the same held only by the shifter arm 82 and the several coacting members are in readiness to commence the operation of addition. But under usual conditions the master wheel or driver 47 willbe held by the spring 51 in its extreme left-hand position clear of all of the rings or computing wheels 3, 3*,

etc. These computing or dial wheels 3, 3*, etc., will all be so positioned that a line of 0s will be exposed through the sight opening 14. As the typewriter carriage C comes to such a position that the initial digit column on the work-sheet, that is, the thousands digit column, is at the printing point of the typewriter, then the master wheel or driver 17 will, through the lug 63, the le-' ver 59, and the shaft 50, be positioned in registerwith the initial computing wheel or ring 3 that is, the computing ring of highest denomination or the thousands computing wheel. Any desired letter space of the work-sheet can be brought into register with any computing wheel by using the lug 63, as a stop after positioning the carriage C, by adjusting the lug 63 and allowing the lever 59 to move under the tension of the spring 51 until it has come into engagement with the stop 63, bringing the master wheel 47 into register with the desired computing wheel. Thedepression of the 7 key f for the first figure in the'first number, not only writes or prints that character on the paper in the proper position, but, through the medium of intermeshing mechanism hereinbefore fully described, causes the shifter 82 to release the gear 68 and connect the disk 78 seven points. Synchronously with these per formances and as a result of the same act,

p the pinions 21 and the blade 30 are elevated.

The rotation. of the gear 68, by the clockmovement, until stopped at the seventh tooth as previously indicated, has caused the driver 47 to turn the ring 3 a like number of teeth 24: and expose the large figure 7 at the opening 14, instead of the cipher. It will be well to state here that the large 0 on each of the said indicator-rings, should be located beneath the opening 1 1 in the case 1, at the commencement of an example in either addition or subtraction; if they do not so appear, the proper type-Writer keys must be manipulated until they conform to the order required. The proper arrangement of 100 the said rings would better be attended to immediately after the completion of an example, but may b done just prior to commencing a new example, of course. To resume the explanation interrupted above: 105,

the release of pressure on the 7 key 1'' enables the carriage C to move one place or step to the left and carry with it the rear end of the arm 59; thereby actuating the block 25 and the plug 26 to the right, the driver 47 passing from the ring 3 to the ring 3. At the same time the blade 30 descends with the pinions '21, the former engaging the teeth 24 of the ring 3 and looking the same, the shifter 82 having, meanwhile, ree'ngaged the gear 68 andpermitted the disk 78 to resume its normal position, and the finger 7 returned to its former place. The depression and elevation of the 9 key f results in substantially the same movements as the depression of the 7 key f, with the exception of throwing up the stopfinger 9 in placeof 7 by means of which the ring 3 exposes 9 at the. opening 14, and the driver 47 moves to the ring 3, leaving the first mentioned ring to be locked by the blade 30, with the ring 3 .The 7 key 1 and the 5 key f are next struck respectively, which bring 7 and 5 on the rings 3 and 3 below the opening 14, leaving the driver 1 I at the end of its travel to the right. Since the driver 47. Owing to the presence of the cam-plate 65, the trippin -lug 63 operates in the manner already explained, to provide for inertia on the part of the driver 47 while the decimal point is printed. The

two ciphers are then written, the stop-finger 0 preventing any rotation of the disk 78 and the ear 68, thus leaving the rings 3" and 3 undisturbed. The plug 26 is now clear of the last ring 3 which is still engaged by the driver 47, however, the latter being the right end of the plug 26 is in contact with the corresponding end of the case 1, further movement of the carriage C to the left is checked by this contact and the latter must be returned to the starting point. The return of the carriage G permits the spring 51 to draw the block 25 with the blade 30,

out ofthe indicator-rin s 3 3 etc. and

the plug 26 with the driver 47 into the same, in readiness for the next step in the process, the cut-out finger 95 having first been introduced between the teeth of the gear 68, by releasing the key 98. The rings 3, 3*, etc. remain in the several positions allotted to them by the driver 47, being held there by the plug 26 and said driver. It will be noticed that the pinions 21 have as yet had no occasion to perform any work.

The second line is next Written and the cut-out key 98 is not depressed until the driver 47 is Within the ring 8 said driver being thus located by the .action of the carriage C which is operated by the space-bar G, when the 4 key ,1 is struck, resulting in turning the ring 3 four points in addition to the nine points previously covered, and exposing a 3 at the case opening, while the right-hand pinion 21 is rotated by the flange teeth or segment 23 belonging to said ring, sufiiciently to movethe ring 3 one point or tooth 24 and change the exposed 7 to 8. The writing of the 7- moves-thering 3 a like numberof teeth 24 in addition to the seven previously turned and exposes a 4, while causing the first pinion 21 to change the 3 on the ring 3"} to 4. The 8 key i gives ters at the opening 14. The number composed of the figures 845350, which shows through the case openingis the answer sought and is written below theline in the proper place. It is obvious that a. column of figures representing any amount Within the capacity of the register can be as readily and accurately added as the two numbers herein employed for an illustration.

From the resultabove obtained, certain amounts are to be subtracted, in order to do which, with my device, it becomes necessary to strike the type-writer keys representing the complements of the figures comprised in said result, or the small figures on the indicator-rings associated therewith, but this is not done until said rings have been rearranged in the manner next to be described. After inserting a slip of paper between the paper on the carriage C and the ribbon of the machine to avoid interfering with the work thereon, actuate said carriage until the lug 63 is in position to operate the arm 59, and strike the proper figure-keys f etc., for causing the several indicator-rings to complete the revolution last begun, which to proceed in precisely the same way as for addition. The large figures 154649 change to 829774 when 675125 are added thereto, which in turn change to 837674 after the 7900 have been written, and finally the addiing 14, in large figures, the small figures or tion of 62975 produces 900649 at the opencomplements of which, 99350-being the correct result of the subtraction. This last number is written in its place, the operator reading from the register, and the process is' completed. Nothing now remains to do, but

rotate the rings 3, 3*, etc. to their initial po- I sitions, cut out the driving gear 68, and if the register is not to be used again before the writing machine is wanted for other purposes, removethe sleeve 61 to the righthand end of the rod 58, or otherwise readj just the former on the latter as occasion may require.

The cipher stop-finger 0 with the connections between it and the figure-key lever F", may beomitted from the constructionof my evice, if desired, and the cut-outdiner 95 permitted to act as a substitute there-.

or. In the absence of the 'ci herstop-finger the cut-out finger 95 is utilized to prevent the driver 47 from turning whenever the cipher-key is struck. h

.-It will be understood that the invention may be embodied or used with typewriting machines of various forms andtherefore it is not deemed necessar to completely illustrate or describe in etail any particular typewriting machine. As usual, the one illustrated includes both letter and figure type, and keys for actuating said type and bearing characters corresponding to the type with which they are connected,

In my Patent No. 7 63,966, I have shown a computing device having incorporated therein some of the features of the present invention.

Having thus described my invention, I

- claim vment having certain parts movable step by step corresponding with the platen movements, and means for automatically suspending and renewing said step by step movement of said parts at one or more points of the movement of the platen.

3. In a computing register for typewriters, in combination with the figure-keys of the writing machine and a driver for said register, a rotary stop-disk connected with said driver, and a series of figure-key-actuated stop-fingers adapted to limit the rotary motion of said disk, for the purpose set forth.

4. In a typewriter, the combination with the figure keys, of a motor actuated computing mechanism, an escapement therefor, and a plurality of rock shafts connected respectively with the figure keys and adapted to control the movements of the escapement of said adding mechanism.

5. In a typewriter provided with a computing mechanism, the combination with a series of letter and figure types, keys having connections for actuating said types, a carriage, and mechanism controlled by each of said keys for moving the carriage letterspace distances, of a computing mechanism including a plurality of indicators, a driver for the indicators, means controlled by the figure keys for moving the driver figurevalue distances, means forv effecting a relative denominational movement between the driver and indicators, and locking means for positively preventing displacement of the indicators and including a pinion that is moved from operative position when establishing operative connection between the indicator controlled by said pinion and the driver.

6. In a typewriter provided with a computing mechanism, the combination with a series of letter and figure types, keys having connections for actuating said types, a carriage, and mechanism controlled by each of said keys for moving the carriage letterspace distances, of a computing mechanism including a plurality of indicators, a driver for'said indicators, means controlled by the figure .keys for moving the driver figurevalue distances, means for effecting a relative denominational movement between the driver and indicators, locking means acting -to positively prevent rotation of all the indicators, carrying devices for transmitting movement from each ind1cator to the indicator of next highest denominatlon, and

means to release said indicator from the locking means during the driving and carrying operation.-

7. The combination with a typewriting machine having a platen movable step by step, and keys and connections for printing letters and figures, of a computing attach ment comprising a series of internally toothed indicator rings, carrying devices arranged within said rings, a rotatable driver arranged within and adapted to mesh with either of said rings, and means. controlled by the figure keys of the typewriter for rotating the driver and the indicator rotating the driver in response to the movement of the figure keys of the typewriter. 9. The combination with a typewriting machine having a platen movable step by internally-toothed indicator rings rotatably mounted in said casing,-a driver arranged within said rings and shiftable step by step from order to order, means for locking the rings which are not in engagement with the driver, and means for releasing the rings at the left of the driver when the driver is operated.

10. The combination with a typewriting machine having a platen movable step by step, and keys and connections for printing letters and figures, of a computing attachment comprising a series of internallytoothed indicator rings, a series of carrying pinions within said rings and movable radially into and out of engagement therewith, a driver within said rings, and means for imparting a step by step movement to the carrier pinions and driver. simultaneously.

marks or spaces may be supplied between printed figures;

12. The combination with a typewriting machine having a platen movable step by step, and keys and connections for printing letters and figures, of a computing attachment comprising a part having a step by step movement, means comprising an arm connecting said part with the typewriter carriage, and devices included in said connecting means whereby said carriage moves independently of said arm, whereby punc tuation marks or spaces may be supplied between printed figures.

13. The combination with a typewriting machine having a platen movable step by step, andkeys and connections for printing letters and figures, of a computing attachment, :1 c nnection between the typewriter carriage a d a part of said computing attachment for imparting a step by step movement to said part, and means for rendering said connections inoperative at certain in tervals of the typewriter carriage movement comprising the lug 63 having shoulders thereon, and the cam plates for raising said lug to cause successive shoulders to cooperate with the connection to the computing device. g

14. The combination with a typewriting machine having a platen movable step by step, and keys and connections for printing letters and figures, of a computing attachment comprising asingle series of indicator rings, a master member therefor, a connection between said master member and said platen, and means for automatically interrupting and renewing the connection to cause the computing attachment to cooperate with difierent parts of the platen, whereby figures written at different parts of the platen may be computed.

15. In a computing register for a typewriter, in combination with the figure keys of the writing machine, a series of coaxial indicator rings having internal teeth, means for rotating one or more of said rings simultaneously with the action of any one of said keys, and'means within the rings for alining and locking said rings before and after turning.

16. in a computing register for typewriters,

in combination with the figure-keys of the writing machine, a series of coaxial indicator-rings representing units, tens, hundreds, etc, means within the rings for revolving any one of said rings independently, simultaneously with the action of any 'one of said keys, and means within the rings for turning, for a fractional part of a revolution, one or more rings of a higher denomination, from one previously moved.

17'. In a computing register for typewriters, in combination with a series of coaxial revoluble indicator-rings, a locking plug adapted to engage and hold one or more of said rings from turning, and means for reciprocating said plug coincidently with the action of the typewriter carriage.

1 8. In a computing register for typewriters, in combination with a series of coaxial revolubie indicator-rings, having internal teeth, a vertically and horizontally-reciprocating locking and alining blade arranged within said rings. 7

1 9. In a computing register for typewriters, the combination with the carriage and figure keys of a typewriter, of a series of coaxial revoluble indicator-rings having teeth, a locking and alining blade adapted to intermittently engage said teeth, means for longitudinally reciprocating said blade coincidently with the action of the typewriter carriage, and means for vertically reciproeating said blade coincidently with the action of any one of the figure-keys 20. In a computing register for typewriters,

the combination with the carriage and figurev keys of a typewriter, of a series of coaxial revoluble indicator-rings having teeth, a locking and alining blade adapted to intermittently engage certain of said teeth, pinions on said blade adapted to intermittently engage certain others of said teeth, means for longitudinally reciprocating said blade and pinions coincidently with the action of the typewriter carriage, and means for ver-- tically reciprocating said blade and pinions coincidently with theaction of any one of the figure keys.

21. In a computing register for typewriters, the combination with the carriage and figure keys of a typewriter, of a series of coaxial indicator rings having internal teeth, carrying devices arranged within said rings, a driver operating within said rings, means for actuating said driver coincidently with the action of thetypewriter carriage, to engage the same with any one of said rings, and means for rotating said driver and engaged ring coincidently with the action of any one of the figure keys.

22. In a computing register for typewriters,

in combination with a series of coaxial indicator rings having teeth, a rotary driver capable of being actuated into engagement with certain of the teeth of any one of said rings and turning the same, and a series of vertically and horizontally reciprocating pinions arranged to engage certain others of said teeth and impart motion to one or more of the inactive rings, from the ring turned by said driver.

28. In a computing register for typewriters,

the combination With-the carriage and figure keys of the typewriter, of a series of coaxial indicator rings having teeth, a driver capable of engaging certain oi said teeth, a series of pinions capable of engaging certain others of said teeth, means for actuating said driver and pinions coincidently with the action of the typewriter carriage, and means for rotating said driver andengaged ring and elevating said pinions coincidently with the action of any one of said figure keys, whereby motion is imparted toone or more of the inactive-rings, from the one turned by said driver.

24. In a computing register for a type-- writer, the combination with the carriage and figure keys of the typewriter, of a series of coaxial indicator rings, a driver, a look ing device, said driver and device bothadaptedto engage said rings, means for simultaneously reciprocating the driver and plug coincidently with the action of the typewriter carriage, and means for rotating the driver coincidently with the action of any one of said figure keys.

25. In a computing register for typewriters,

the combination with the carriage and figure keys of the typewriter, of a series of coaxial indicator rings,,a driver, a blade, both driver andblade being adapted to engage said rings, means for simultaneously reciprocating the driver and blade coincidently with the action of the typewriter carriage and means for rotating the driver coincidently with the action of any one of the said figure keys. I

26. In a computing register for typewriters, the .combination with the carriage and the figure keys of the typewriter, of a series of coaxial indicator rings, a driver, a plug, a

weenie arranged within and adapted to intermitrv tently engage the teeth of the indicator rings, and connections between said typewriter keys and pinions, whereby the action of any of the former is communicated to the latter. v

28. In a computing register for ty ewriters, the combination with the figure keys of a typewriter, of a series of internally toothed indicator rings, an alining and locking blade arranged within and adapted to engage one or more of said toothed indicator rings, and connections between said keys and blade whereby the action of any of the former is communicated to the latter.

29. In a computing register for typewriters, the combination with the figure keys of atypewriter, of a series of internally toothed indicator rings, an alining and locking blade provided with a series of pinions, said blade and pinions being adapted to intermittently engage one or more of said indicator rings, and connections between said keys and the blade and pinions, whereby the action of any of the keys is communicated to the blade and pinions.

30. The combination with a typewriting machine having a platen movable step by step, keys, and means controlled by the keys for printin letters and figures, of a computing attac ment comprising a series of indicator rings haying internal teeth, a driver 4 movable within said rings, carrying pinions movable within said rings, and means controlled by the typewriter carriage for effecting a relative movement betweenthe indicator rings and the driver and carryingpinions.

31. In a computing register, in combination with the carriage of a typewriter, and

'with a series of indicator rings, devices cooperating with said rings comprising a driver, a series of pinions, a plug, an alining and locking blade, and intermediate mechanism between said carriage and said devices whereby the latter are reciprocated in correspondence with the movement of the former. 32.,A computing machine combining a typewriter carriage, a register provided with a ongitudinally-movab connected to said member, a stepped tripping-lug connected with said carriage, and a cam-plate device in the path of said lug to control the connection between said carriage and said arm.

33. The combination of a typewriting ma. chine, a computing mechanism, a rotatable driver for said computing mechanism, a source of power for rotating said driver, a series of stops rotatable with said driver, and means operated by the figure keys of the typewriting machine for engaging one of said stops, thereby checking-said driver in accordance with the particular key actuated.

e member, an arm 

